The troubleshooting documentation for the error message 'Unable to create a build on the specified database and schema' explicitly lists two primary causes related to missing schema-level privileges: 'The 'CREATE SNOWFLAKE.ML.DOCUMENT_INTELLIGENCE privilege is not granted to your role' and 'Your role has not been granted the 'CREATE MODEL' privilege on the schema that uses the model'. Both of these privileges are required on the schema to prepare a DocumentAI model build. Therefore, the combination of both missing would directly lead to this specific error. Options C and D are individual components of the correct answer, but the question asks for the 'combination of missing schema-level privileges' as cited in the documentation.